bool
InflationOpFrame::doApply(medida::MetricsRegistry& metrics, LedgerDelta& delta,
LedgerManager& ledgerManager)
{
LedgerDelta inflationDelta(delta);
auto& lcl = inflationDelta.getHeader();
time_t closeTime = lcl.scpValue.closeTime;
uint32_t seq = lcl.inflationSeq;
time_t inflationTime = (INFLATION_START_TIME + seq * INFLATION_FREQUENCY);
if (closeTime < inflationTime)
{
metrics.NewMeter({"op-inflation", "failure", "not-time"}, "operation")
.Mark();
innerResult().code(INFLATION_NOT_TIME);
return false;
}
/*
Inflation is calculated using the following
1. calculate tally of votes based on "inflationDest" set on each account
2. take the top accounts (by vote) that get at least .05% of the vote
3. If no accounts are over this threshold then the extra goes back to the
inflation pool
*/
int64_t totalVotes = lcl.totalCoins;
int64_t minBalance =
bigDivide(totalVotes, INFLATION_WIN_MIN_PERCENT, TRILLION);
std::vector<AccountFrame::InflationVotes> winners;
auto& db = ledgerManager.getDatabase();
AccountFrame::processForInflation(
[&](AccountFrame::InflationVotes const& votes)
{
if (votes.mVotes >= minBalance)
{
winners.push_back(votes);
return true;
}
return false;
},
INFLATION_NUM_WINNERS, db);
int64 amountToDole =
bigDivide(lcl.totalCoins, INFLATION_RATE_TRILLIONTHS, TRILLION);
amountToDole += lcl.feePool;
lcl.feePool = 0;
lcl.inflationSeq++;
// now credit each account
innerResult().code(INFLATION_SUCCESS);
auto& payouts = innerResult().payouts();
int64 leftAfterDole = amountToDole;
for (auto const& w : winners)
{
AccountFrame::pointer winner;
int64 toDoleThisWinner =
bigDivide(amountToDole, w.mVotes, totalVotes);
if (toDoleThisWinner == 0)
continue;
winner = AccountFrame::loadAccount(w.mInflationDest, db);
if (winner)
{
leftAfterDole -= toDoleThisWinner;
lcl.totalCoins += toDoleThisWinner;
winner->getAccount().balance += toDoleThisWinner;
winner->storeChange(inflationDelta, db);
payouts.emplace_back(w.mInflationDest, toDoleThisWinner);
}
}
// put back in fee pool as unclaimed funds
lcl.feePool += leftAfterDole;
inflationDelta.commit();
metrics.NewMeter({"op-inflation", "success", "apply"}, "operation").Mark();
return true;
}
bool
InflationOpFrame::doApply(medida::MetricsRegistry& metrics, LedgerDelta& delta,
LedgerManager& ledgerManager)
{
LedgerDelta inflationDelta(delta);
auto& lcl = inflationDelta.getHeader();
time_t closeTime = lcl.scpValue.closeTime;
uint32_t seq = lcl.inflationSeq;
time_t inflationTime = (INFLATION_START_TIME + seq * INFLATION_FREQUENCY);
if (closeTime < inflationTime)
{
metrics.NewMeter({"op-inflation", "failure", "not-time"}, "operation")
.Mark();
innerResult().code(INFLATION_NOT_TIME);
return false;
}
/*
Inflation is calculated using the following
1. calculate tally of votes based on "inflationDest" set on each account
2. take the top accounts (by vote) that exceed 1.5%
(INFLATION_WIN_MIN_PERCENT) of votes,
up to 50 accounts (INFLATION_NUM_WINNERS)
exception:
if no account crosses the INFLATION_WIN_MIN_PERCENT, the top 50 is used
3. share the coins between those accounts proportionally to the number
of votes they got.
*/
int64_t totalVotes = 0;
bool first = true;
int64_t minBalance =
bigDivide(lcl.totalCoins, INFLATION_WIN_MIN_PERCENT, TRILLION);
std::vector<AccountFrame::InflationVotes> winners;
auto& db = ledgerManager.getDatabase();
AccountFrame::processForInflation(
[&](AccountFrame::InflationVotes const& votes)
{
if (first && votes.mVotes < minBalance)
{
// need to take the entire set if nobody crossed the threshold
minBalance = 0;
}
first = false;
bool res;
if (votes.mVotes >= minBalance)
{
totalVotes += votes.mVotes;
winners.push_back(votes);
res = true;
}
else
{
res = false;
}
return res;
},
INFLATION_NUM_WINNERS, db);
int64 amountToDole =
bigDivide(lcl.totalCoins, INFLATION_RATE_TRILLIONTHS, TRILLION);
amountToDole += lcl.feePool;
lcl.feePool = 0;
lcl.inflationSeq++;
// now credit each account
innerResult().code(INFLATION_SUCCESS);
auto& payouts = innerResult().payouts();
if (totalVotes != 0)
{
for (auto const& w : winners)
{
AccountFrame::pointer winner;
int64 toDoleThisWinner =
bigDivide(amountToDole, w.mVotes, totalVotes);
if (toDoleThisWinner == 0)
continue;
winner = AccountFrame::loadAccount(w.mInflationDest, db);
if (winner)
{
lcl.totalCoins += toDoleThisWinner;
winner->getAccount().balance += toDoleThisWinner;
winner->storeChange(inflationDelta, db);
payouts.emplace_back(w.mInflationDest, toDoleThisWinner);
}
else
{
// put back in fee pool as unclaimed funds
lcl.feePool += toDoleThisWinner;
}
}
}
else
{
// put back in fee pool as unclaimed funds
lcl.feePool += amountToDole;
}
inflationDelta.commit();
metrics.NewMeter({"op-inflation", "success", "apply"}, "operation").Mark();
return true;
}
